What is nanoDAC+?
The new quad AD5686R/AD5685R/AD5684R nanoDAC+TM is a family of 16-bit/14-bit/12-bit, rail-to-rail, voltage output DACs. This family offers huge performance in a tiny package.
What is new?
The nanoDAC+TM family employ a new addressing scheme that allows 1,2,3 or 4 channels and any combination of channels to be updated simultaneity via a single write sequence.
The devices include a 2.5V, 2ppm/˚C internal reference (enabled by default) and a gain select pin giving a full-scale output of 2.5V (gain=1) or 5V (gain=2).
The specifications are tighter than the previous generation and competitor offerings:
What type of performance can we expect?
What marks the nanoDAC+TM apart is the level performance in the string DAC space. The parts exhibit high relative accuracy: AD5686R (16-bit): ±2LSB INL max. The device operates from a single 2.7 V to 5.5 V supply, is guaranteed monotonic by design and exhibits less than 0.1% FSR gain error and 1.5mV offset error performance.
AD5686R (16-bit): ±2LSB INL max
Total unadjusted error (TUE): ±0.1% of FSR maximum
Offset error: ±1.5 mV maximum
Gain error: ±0.1% of FSR maximum
High drive capability: 20 mA, 0.5 V from supply rails
Ultra Low glitch: 0.5 nV-sec
Robust 4 kV HBM and 1.5 kV FICDM ESD rating
Low power: 3.3 mW at 3 V
Are there package alternatives?
The device is available in a 3mm X 3mm LFCSP where board area is important and a TSSOP package is available if you like to have a larger package that might be easier to access.
What type of digital functions are available?
As well as the GAIN pin that allows a you to select either a 0-2.5V or 0-5V output, the AD5686R also incorporates a power-on-reset circuit and a RSTSEL pin that ensures the DAC outputs power up to zero-scale or midscale, and remain there until a valid write takes place. Each device contains a per-channel power-down feature that reduces the current consumption of the device to 4 uA at 3 V while in power-down mode.
The AD5686R employs a versatile SPI interface that operates at clock rates up to 50 MHz and includes a VLOGIC pin intended for 1.8V/ 3V/ 5V logic.
Are there i2c alterantives?
The AD5696R/AD5695R/AD5694R is a family of quad i2c 16-bit/14-bit and 12-bit equalivent nanoDAC+TM devices.